How many bricks are used to construct the wall ?

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The outer dimensions of a cubical room are 8m*6m*4m (roof is not included in the dimension).
If the size of brick used (including cement) are 20cm*10cm*8cm.
Then how many bricks are used to construct the wall ?

1 Answer

So, first side we can use (800/20)*(400/8) bricks. that is, 2000 bricks.
The opposite side of this wall we can use the same, that is 2000 bricks.
hence the other to sides length is now decremented by 20. that is 580.
these side we can use {(580/20)*(400/8)}*2 bricks. that is 2900 bricks.

Rahul forms a wall in 10 days and Sahil forms a wall in 15 days. Rahul and Sahil start the work of forming wall together but after 2 days Rahul leaves the work.
How many days are required for making the remaining wall by Sahil?